UNPKG

pex-color

Version:

Color utilities (css, p3, hex, hsl, hsv, hwb, lab, lch, xyz, okhsl, okhsv, oklab, oklch, hpluv, hsluv, lchuv, bytes) for PEX.

44 lines (40 loc) 1.14 kB
import { linearToRgb, rgbToLinear, oklabToLinear, linearToOklab, setAlpha, } from "./utils.js"; /** * @typedef {number[]} oklab Cartesian form using D65 standard illuminant. * * Components range: 0 <= l <= 1; -0.233 <= a <= 0.276; -0.311 <= b <= 0.198; * @see {@link https://bottosson.github.io/posts/oklab/#converting-from-linear-srgb-to-oklab} */ /** * Updates a color based on Oklab values and alpha. * @alias module:pex-color.fromOklab * @param {import("./color.js").color} color * @param {number} L * @param {number} a * @param {number} b * @param {number} [α] * @returns {import("./color.js").color} */ export function fromOklab(color, L, a, b, α) { oklabToLinear(L, a, b, color); linearToRgb(color[0], color[1], color[2], color); return setAlpha(color, α); } /** * Returns an Oklab representation of a given color. * @alias module:pex-color.toOklab * @param {import("./color.js").color} color * @param {Array} out * @returns {oklab} */ export function toOklab([r, g, b, a], out = []) { rgbToLinear(r, g, b, out); linearToOklab(out[0], out[1], out[2], out); return setAlpha(out, a); }